Jump to main content
Jump to site search

Issue 46, 2014
Previous Article Next Article

Porous cobalt, nitrogen-codoped carbon nanostructures from carbon quantum dots and VB12 and their catalytic properties for oxygen reduction

Author affiliations

Abstract

The porous cobalt, nitrogen-codoped carbon materials (Co/N/C) were synthesized by a facile one-step pyrolysis of vitamin B12 (VB12) and carbon quantum dots (CQDs). Varying the initial mass ratio of CQDs and VB12 leads to controllable concentrations of Co (0% to 3.68%) and N (0% to 5.88%) after pyrolysis. The obtained Co/N/C was evaluated by oxygen reduction reaction (ORR) in both alkaline and acid media. Particularly, the Co/N/C with 1.12% Co and 2.92% N prepared at 700 °C (Co1.12/N2.92/C-700) exhibited the best catalytic ability for ORR with a cathodic peak at −0.165 and 0.185 V (vs. SCE) in 0.1 M KOH and 0.1 M HClO4 solution, respectively, which are comparable to that of Pt/C (20%). The Co1.12/N2.92/C-700 also showed long-term stability and high methanol tolerance, which outperformed commercial Pt/C (20%).

Graphical abstract: Porous cobalt, nitrogen-codoped carbon nanostructures from carbon quantum dots and VB12 and their catalytic properties for oxygen reduction

Back to tab navigation

Supplementary files

Publication details

The article was received on 13 Sep 2014, accepted on 15 Oct 2014 and first published on 16 Oct 2014


Article type: Paper
DOI: 10.1039/C4CP04119D
Citation: Phys. Chem. Chem. Phys., 2014,16, 25350-25357
  •   Request permissions

    Porous cobalt, nitrogen-codoped carbon nanostructures from carbon quantum dots and VB12 and their catalytic properties for oxygen reduction

    Y. Yang, J. Liu, Y. Han, H. Huang, N. Liu, Y. Liu and Z. Kang, Phys. Chem. Chem. Phys., 2014, 16, 25350
    DOI: 10.1039/C4CP04119D

Search articles by author

Spotlight

Advertisements